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Related Experiment Videos

Compact and ordered collapse of randomly generated RNA sequences.

Erik A Schultes1, Alexander Spasic, Udayan Mohanty

  • 1Whitehead Institute for Biomedical Research, 9 Cambridge Center, Cambridge, Massachusetts 02142, USA.

Nature Structural & Molecular Biology
|November 8, 2005
PubMed
Summary
This summary is machine-generated.

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Arbitrary RNA sequences form ordered structures, but natural selection is needed for unique folding. Evolved RNA sequences achieve specific conformations, unlike random sequences which often have multiple structures.

Area of Science:

  • Molecular Biology
  • Biophysics
  • Evolutionary Biology

Background:

  • Arbitrary RNA sequences serve as a baseline for understanding RNA structure formation.
  • Comparing evolved RNA structures to random sequences provides evolutionary insights.

Purpose of the Study:

  • To investigate the structural properties of randomly generated RNA sequences.
  • To compare the folding behavior of arbitrary RNA with evolved RNA isolates.

Main Methods:

  • Physical and chemical methods were employed.
  • Analysis of RNA sequences with sufficient length and information content for complex folds.

Main Results:

  • Unevolutionized RNAs exhibited sequence-specific secondary structures.

Related Experiment Videos

  • Arbitrary RNAs showed magnesium-dependent compact conformations, similar to evolved RNAs.
  • Random sequences frequently displayed multiple competing conformations.

    • Conclusions:

    • Natural selection is crucial for achieving uniquely folding RNA sequences.
    • Well-ordered secondary structures and compactness in evolved RNAs are not solely attributable to random chance.